<template>
    <div class="sidebar">
        <el-menu class="sidebar-el-menu" :default-active="onRoutes" background-color="#324157" text-color="#bfcbd9"
            active-text-color="#20a0ff" unique-opened router>
            <template v-for="item in items">
                <template v-if="item.subs">
                    <el-submenu :index="item.index" :key="item.index">
                        <template slot="title">
                            <i :class="item.icon"></i>
                            <span>{{ item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subItem.index">
                                <template slot="title">{{ subItem.title }}</template>
                                <el-menu-item v-for="(threeItem, i) in subItem.subs" :key="i" :index="threeItem.index">
                                    {{ threeItem.title }}</el-menu-item>
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.index" :key="subItem.path">{{ subItem.title }}
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i>
                        <template slot="title">{{ item.title }}</template>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
export default {
    data() {
        return {
            items: [
                {
                    icon: "el-icon-s-home",
                    title: "学校模块",
                    index: "school",
                    subs: [
                        {
                            index: 'kindergarten',
                            title: '幼儿园'
                        },
                        {
                            index: 'primary',
                            title: '小学'
                        },
                        {
                            index: 'junior',
                            title: '初中'
                        },
                        {
                            index: 'senior',
                            title: '高中'
                        },
                        {
                            index: 'university',
                            title: '大学'
                        }
                    ]
                }
            ]
        }
    },
    methods: {},
    computed: {
        onRoutes() {
            return this.$route.path
        }
    }
}
</script>

<style lang="less" scoped>
.sidebar {
    display: block;
    position: absolute;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: scroll;
}

.sidebar::-webkit-scrollbar {
    width: 0;
}

.sidebar-el-menu:not(.el-menu--collapse) {
    width: 250px;
}

.sidebar>ul {
    height: 100%;
}
</style>